| AnyRtttl | A feature rich arduino library for playing rtttl melodies. |
| BitReader | The BitReader library is an arduino library that allows one to read or write data which is not aligned on 8, 16 or 32 bits variables. |
| NonBlockingRTTTL | Non-blocking Arduino library for playing RTTTL melodies. |
| SoftTimers | The SoftTimers arduino library is a collection of software timers. The library aims at greatly simplifying multitask complexity. |